MEDICAL
HEART AND PERICARDIUM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In a ____ the recording has a wavelike up and down movement throughout the tracing.
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somatic tremor
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wandering baseline
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interrupted baseline
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AC interference
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Explanation:
Detailed explanation-1: -Baseline wander, which is often exercise-induced, may result from a variety of noise sources including perspiration, respiration, body movements, and poor electrode contact. The magnitude of the undesired wander may exceed the amplitude of the QRS complex by several times.
Detailed explanation-2: -The upward movement away from the baseline in the ECG tracing is called. positive deflection.
Detailed explanation-3: -Baseline wander is a low-frequency noise of around 0.5 to 0.6 Hz. To remove it, a high-pass filter of cut-off frequency 0.5 to 0.6 Hz can be used. Powerline interference (50 or 60 Hz noise from mains supply) can be removed by using a notch filter of 50 or 60 Hz cut-off frequency.
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